1
GATE EE 1999
+2
-0.6
The voltage phasor of a circuit is $$10\angle {15^0}\,V$$ and the current phasor is $$2\,\,\angle - {45^0}A.$$ The active and the reactive powers in the circuit are
A
$$10$$ $$W$$ and $$17.32$$ $$VAR.$$
B
$$5$$ $$W$$ and $$8.66$$ $$VAR$$.
C
$$20$$ $$W$$ and $$60$$ $$VAR.$$
D
$$20\,\,\sqrt 2 \,\,W$$ and $$10\sqrt 2 \,\,VAR.$$
2
GATE EE 1997
Fill in the Blanks
+2
-0
Two identical coils of negligible resistance when connected in series across a $$200V,$$ $$50$$ $$Hz$$ source draws, a current of $$10$$ $$A.$$ When the terminals of one of the coils are reversed, then current drawn is $$8$$ $$A.$$ The coefficient of coupling between the two coils is
3
GATE EE 1996
+2
-0.6
A coil (which can be modeled as a series $$RL$$ circuit) has been designed for high $$-$$ $$Q$$ performance at a rated voltage and a specified frequency. If the frequency of operation is doubled, and the coil is operated at the same rated voltage, then the $$Q$$$$-$$factor and the active power $$P$$ consumed by the coil will be affected as follows
A
$$P$$ is doubled, $$Q$$ is halved
B
$$P$$ is halved, $$Q$$ is doubled
C
$$P$$ remains constant, $$Q$$ is doubled
D
$$P$$ decreased $$4$$ times, $$Q$$ is doubled
4
GATE EE 1994
Fill in the Blanks
+2
-0
In the given circuit, the voltage $$\overline {{V_L}}$$ has a phase angle of ____________ with respect to $$\overline {{V_S}} .$$
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement
EXAM MAP
Joint Entrance Examination